Table 1.
Synthetic overview of the data collected in our review including iron concentration variation among different plant parts.
| Plant Part | Number of Species a | Number of Families | Minimum Iron Conc. (mg/kg, dwb b) | Maximum Iron Conc. (mg/kg, dwb b) | Median Iron Conc. (95% CI) (mg/kg, dwb b) | Mean Iron Conc. (95% CI) (mg/kg, dwb b) |
|---|---|---|---|---|---|---|
| Root | 66 | 33 | 1.9 | 111,200.0 | 502.4 (259.3–691.0) | 5706.0 (2750, 11,560) |
| Stem | 60 | 34 | 7.3 | 25,650.0 | 171.0 (69.2–313.4) | 1431.0 (829, 2696) |
| Shoot | 32 | 22 | 20.2 | 9418.0 | 91.0 (72.7–101.5) | 513.5 (227.1–1113.8) |
| Bark | 41 c | 19 | 3.6 | 1585.0 | 45.0 (35.0–57.0) | 106.8 (74.3–188.8) |
| Leaf | 632 d | 155 | 0.1 | 24,070.0 | 167.0 (155.2–186.6) | 489.4 (401.8–618.4) |
| Aerial parts | 295 | 89 | 0.0 | 27,100.0 | 240.1 (216.5–263.3) | 596.9 (468.4–900.8) |
| Flower | 28 | 15 | 15.7 | 5139.0 | 159.9 (91.2–194.1) | 426.1 (187.5–1008.1) |
| Fruit | 200 e | 62 | 0.0 | 8424.0 | 72.6 (61.0, 87.7) | 257.9 (195.2–393.3) |
| Seed | 104 | 42 | 0.0 | 11,610.0 | 70.2 (53.8–90.0) | 522.6 (333.0–894.4) |
| Whole plant | 41 | 25 | 11.4 | 70,480.0 | 156.0 (89–747) | 2785.0 (1072–9184) |
| Wood | 35 | 15 | 0.0 | 35.0 | 0.0 (N/A) | 3.4 (1.9–6.5) |
| Other parts f | 30 | 28 | 0.7 | 3730.0 | 141.0 (80.0–215.0) | 293.1 (179.3–657.2) |
a Given that, for some species, iron values were available for several plant parts, whereas in the case of others iron values were available only for one or two parts, the total in this column adds up to 1562 and not 1228. The same reason explains the apparent discrepancy regarding the number of subspecies and varieties (one organ was reported for the species, while a different organ for a subspecies or variety of the same species); b dwb = on a dry weight basis; c + 1 subspecies; d + 2 subspecies + 3 varieties; e + 1 subspecies; f aril, bud, bulb, calyx, false fruit, leaf pulp etc. (see Figure S22).